| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #pragma once |
| |
| /* https://github.com/android/ndk/issues/1422 */ |
| #include <features.h> |
| |
| #include <asm/unistd.h> /* For system call numbers. */ |
| #define MAX_ERRNO 4095 /* For recognizing system call error returns. */ |
| |
| #define __bionic_asm_custom_entry(f) |
| #define __bionic_asm_custom_end(f) |
| #define __bionic_asm_function_type @function |
| #define __bionic_asm_custom_note_gnu_section() |
| |
| #if defined(__aarch64__) |
| #include <private/bionic_asm_arm64.h> |
| #elif defined(__arm__) |
| #include <private/bionic_asm_arm.h> |
| #elif defined(__i386__) |
| #include <private/bionic_asm_x86.h> |
| #elif defined(__riscv) |
| #include <private/bionic_asm_riscv64.h> |
| #elif defined(__x86_64__) |
| #include <private/bionic_asm_x86_64.h> |
| #endif |
| |
| // Starts a normal assembler routine. |
| #define ENTRY(__f) __ENTRY_WITH_BINDING(__f, .globl) |
| |
| // Starts an assembler routine with hidden visibility. |
| #define ENTRY_PRIVATE(__f) \ |
| __ENTRY_WITH_BINDING(__f, .globl); \ |
| .hidden __f; |
| |
| // Starts an assembler routine that's weak so native bridges can override it. |
| #define ENTRY_WEAK_FOR_NATIVE_BRIDGE(__f) __ENTRY_WITH_BINDING(__f, .weak) |
| |
| // Starts an assembler routine with hidden visibility and no DWARF information. |
| // Only used for internal functions passed via sa_restorer. |
| // TODO: can't we just delete all those and let the kernel do its thing? |
| #define ENTRY_NO_DWARF_PRIVATE(__f) \ |
| __ENTRY_NO_DWARF(__f, .globl); \ |
| .hidden __f; |
| |
| // (Implementation detail.) |
| #define __ENTRY_NO_DWARF(__f, __binding) \ |
| .text; \ |
| __binding __f; \ |
| .balign __bionic_asm_align; \ |
| .type __f, __bionic_asm_function_type; \ |
| __f: \ |
| __bionic_asm_custom_entry(__f); |
| |
| // (Implementation detail.) |
| #define __ENTRY_WITH_BINDING(__f, __binding) \ |
| __ENTRY_NO_DWARF(__f, __binding); \ |
| .cfi_startproc; |
| |
| // Ends a normal assembler routine. |
| #define END(__f) \ |
| .cfi_endproc; \ |
| END_NO_DWARF(__f) |
| |
| // Ends an assembler routine with no DWARF information. |
| // Only used for internal functions passed via sa_restorer. |
| // TODO: can't we just delete all those and let the kernel do its thing? |
| #define END_NO_DWARF(__f) \ |
| .size __f, .- __f; \ |
| __bionic_asm_custom_end(__f) |
| |
| // Creates an alias `alias` for the symbol `original`. |
| #define ALIAS_SYMBOL(alias, original) \ |
| .globl alias; \ |
| .equ alias, original |
| |
| // Creates an alias `alias` for the symbol `original` that's weak so it can be |
| // separately overridden by native bridges. |
| #define ALIAS_SYMBOL_WEAK_FOR_NATIVE_BRIDGE(alias, original) \ |
| .weak alias; \ |
| .equ alias, original |
| |
| // Adds a GNU property ELF note. Important on arm64 to declare PAC/BTI support. |
| #define NOTE_GNU_PROPERTY() __bionic_asm_custom_note_gnu_section() |
| |
| // Gives local labels a more convenient and readable syntax. |
| #define L(__label) .L##__label |